If the grading of malocclusion is classified as "mild", "moderate"
and "severe" the scale of measurement used is:
1. Interval
2. Nominal
3. Ordinal
4. Ratio
OrthodonticsAnswer: 3
Typically rapid palatal expansion is done with a jack screw that is activated at the rate of 1) 1.0 to 2.0 mm/week 2) 1.0 to 2.0 mm/day 3) 0.5 to 1.0 mm/week 4) 0.5 to 1.0 mm/day
OrthodonticsAnswer: 4
Enlow"s "V" principle of growth is found in 1) Cranial base 2) Maxilla only 3) Maxilla and mandible 4) None of the above
OrthodonticsAnswer: 3
When mixed dention changes to permanent dentition, incompetent lip may 1) Become more incompetent 2) Become hypertonic 3) Straighten the upper central incisors 4) Be held together of self consciousness
OrthodonticsAnswer: 4
Corrected incisor relation in cephalometrics is useful to 1) Assess skeletal relation 2) Assess growth of jaws 3) Determine skeletal malocclusion 4) All of the above
OrthodonticsAnswer: 1
Tooth in the mandibular arch which is most likely to be displaced due to arch size discrepancy is 1) First molar 2) Second molar 3) First premolar 4) Second premolar
OrthodonticsAnswer: 4
In an individual whose mandible is growing less forward than expected, the lower incisors will probably be inclined 1) Backward 2) Forward 3) Vertically over basal bone 4) No relation at all
OrthodonticsAnswer: 2
Placing the beaks into the furcation of primary second molar during extraction in 6-year-old child is contraindicated because 1) Proximity of succedaneous tooth buds 2) Of possibility of fracture of crowns 3) Of possibility of fracture of facial plates 4) Of possibility of fracture of lingual plates
